<?php
/**
 * This code is licensed under the BSD 3-Clause License.
 *
 * Copyright (c) 2017, Maks Rafalko
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

declare(strict_types=1);

namespace Infection\Tests\AutoReview\EnvVariableManipulation;

use Infection\CannotBeInstantiated;
use function sprintf;
use function str_contains;

final class EnvManipulatorCodeDetector
{
    use CannotBeInstantiated;

    private const FUNCTIONS = [
        'putenv',
        'Safe\putenv',
    ];

    /**
     * @var string[]|null
     */
    private static ?array $statements = null;

    public static function codeManipulatesEnvVariables(string $code): bool
    {
        foreach (self::getStatements() as $statement) {
            if (str_contains($code, $statement)) {
                return true;
            }
        }

        return false;
    }

    /**
     * @return string[]
     */
    private static function getStatements(): array
    {
        if (self::$statements !== null) {
            return self::$statements;
        }

        foreach (self::FUNCTIONS as $safeFunctionName) {
            self::$statements[] = sprintf('use function %s', $safeFunctionName);
            self::$statements[] = sprintf('\\%s(', $safeFunctionName);
        }

        return self::$statements;
    }
}
